Mana Cauldron

At the beginning of your end step, you may reveal your hand and put all land cards from it onto the battlefield. If you do, discard your hand.

Each player may play an additional land during each of their turns. Whenever a land is tapped for mana, return it to its owner's hand.

Flying Landfall — Whenever a land you control enters, you may create a 1/1 white Bird creature token with flying.

Landfall — Whenever a land you control enters, you may gain 2 life.

Landfall — Whenever a land you control enters, target player mills three cards. (They put the top three cards of their library into their graveyard.)

Landfall — Whenever a land you control enters, you may have target player lose 3 life. If you do, put three +1/+1 counters on Ob Nixilis.

Trample Landfall — Whenever a land you control enters, create a 4/4 green Beast creature token.

Flying Landfall — Whenever a land you control enters, you may gain control of target creature for as long as you control this creature.

Flying Landfall — Whenever a land you control enters, you may exile target nonland permanent other than this creature. When this creature leaves the battlefield, return all cards exiled with it to the battlefield under their owners' control.

Landfall — Whenever a land you control enters, you may have this creature deal 1 damage to target player or planeswalker.